Analysis of beverages and drinking water
Water, coffee, tea or soft drinks are among the most commonly consumed beverages. Their most important feature is covering the daily liquid requirement. In addition, alcoholic beverages such as beer and wine are also very popular as stimulants. For beverage producers and breweries, sterile equipment, surfaces, bottles and packaging are of paramount importance. Residues from production as well as disinfectants must be carefully rinsed out of line systems and bottles before filling. Testing for contaminants such as various pesticides in teas or acrylamides in coffee is also essential for quality control. MACHEREY‑NAGEL supports you in your daily laboratory analysis and offers a wide range of products for monitoring water and beverage products.
Overview Food AnalysisResidues of disinfectants (peroxide, peracetic acid)
For beverage producers and breweries, sterile equipment, surfaces, bottles and packages are of paramount importance. Disinfectants must be carefully rinsed out of line systems and bottles before bottling in order to offer a safe and harmless beverage on the market. The QUANTOFIX Peroxide test strips are a simple, fast and safe method to control the rinsing and washing processes. Their reliable detection of peroxides from a concentration of 0.5 mg/L and avoidance of false-positive results make them excellent for this application. The QUANTOFIX test strips for the detection of peracetic acid are also used in the beverage industry in quality control to check for disinfection residues. They react specifically to peracetic acid and are ideal for peracetic acid-based disinfectants.
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Ascorbic acid as stabilizing agent
Ascorbic acid - also known as vitamin C - is added to many beverages as a stabilizer. Due to the rapid reaction of ascorbic acid with oxygen, this addition protects the beverage from chemical oxidation after bottling. Ascorbic acid is thus a highly potent antioxidant. It is mainly added to alcoholic beverages, fruit juices and water and ensures the taste and aroma of the beverage in addition to its harmlessness. The addition of ascorbic acids to beverages and drinking water can always be seen in the contents information on the packaging.
The QUANTOFIX Ascorbic Acid test strips allow an easy and fast determination of vitamin C in juices or soft drinks and other beverages. By simply "dipping & reading" you get reliable results within 30 seconds!
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Cyanide concentrations in fruit brandy production
The production of fruit brandy can lead to the formation of prussic acid - also known as hydrogen cyanide - in certain varieties. This substance can have a lethal effect from just a few milligrams per kilogram of body weight, which is why checking for prussic acid is immensely important. This risk is particularly elevated in stone fruit varieties such as peaches or apricots. Higher concentrations occur in the pits of the fruit in certain (so-called early) varieties and in nutrient-poor and dry soils. However, this concentration does not pose a risk if the fruit is eaten normally - as long as the fruit pit is not crushed and eaten. In fruit brandy production, however, fruit pit residues can lead to an increase in the cyanide concentration in the product. With the QUANTOFIX Cyanide Test Strips you can quickly and easily check fruit brandies for the very toxic parameter and ensure a safe beverage.
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Avoid toxic nitrite in the water!
Nitrate is a nitrogen supplier and, due to its occurrence in soils, is essential for the growth of plants and roots. For humans, nitrate is also an important nutrient up to a certain concentration and promotes blood circulation, for example. However, too much nitrate is converted in the body into nitrite and nitrosamines, which in turn inhibit oxygen transport in the body and are therefore highly toxic.
Due to the nutrient-supplying effect of nitrates, they are used as fertilizers in agriculture. Excessive fertilization thus causes nitrates to enter the groundwater, which, depending on the quality and region, can later be found in drinking and tap water. This water is especially dangerous for small children and infants, which is why explicitly low-nitrate and low-nitrite water is available for purchase. With our QUANTOFIX Nitrate/Nitrite test strips you can test drinking water for nitrate and nitrite in quality control and avoid health complaints and consequences.
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Brewery analysis according to MEBAK
The Central European Brewing Technology Analysis Commission MEBAK e.V. has fixed standardized analysis methods for its members for all raw materials, auxiliary materials and supplies, based on the internationally recognized analysis methods of the European Brewery Convention (EBC), the American Society of Brewing Chemists (ASBC) and the Association Latinoamericana de Fabricantes de Cerveza (ALAFACE). In order to ensure the high quality of the brewed beer, it is extremely important to monitor the raw materials, the brewing process and the final product. The NANOCOLOR UV/VIS II and VIS II spectrophotometers support a large number of the spectrophotometric applications described by MEBAK, which are necessary for monitoring the brewing process. These include, for example, parameters such as bitterness units, beer color, wort and iron. The corresponding methods are already pre-programmed by default and are directly available to every user at no additional cost.
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Acrylamide in coffee and water
One of the unwanted substances in coffee is acrylamide, which is formed when asparagine reacts with glucose. High doses of acrylamide have been shown to be carcinogenic and mutagenic in animal studies. Testing for acrylamide in foods is often performed as part of general food monitoring. Recommendations on guideline values for acrylamide in food have been published by the EU Commission and are taken into account in investigations. Sample preparation methods have been established that allow efficient depletion of matrix components from coffee extracts. Clean-up methods with classical SPE columns as well as dispersive SPE (QuEChERS) are used in coffee analysis. We have prepared an application note showing that the determination of acrylamide from coffee and, in particular, matrix depletion could be successfully performed with all MACHEREY‑NAGEL products tested.
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Pesticides in tea
The determination of pesticides in food and feed is part of routine food control. Therefore, the QuEChERS methodology is used for many sample matrices as part of sample preparation. It provides many advantages allowing rapid and cost-effective clean-up of strongly matrix-contaminated samples like black tea
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Organic acids in wine
Organic acids in wine are essential for flavor and aroma. We determined the organic acids in various wines by testing with high performance liquid chromatography. In the following application you can see the results of determining organic acids in Chardonnay on our NUCLEODUR C18 Gravity-SB column.
NUCLEODUR C18 Gravity-SB is a hydrophobic C18 phase with distinct polar selectivity for better retention of early eluting substances. This HPLC Phase is made of high purity NUCLEODUR HPLC silica gel and shows excellent performance under highly aqueous conditions.
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Identifying ingredients in whiskies
Regardless of its origin, whisk(e)y is a spirit made from fermented grains. Because sources of grain and production methods vary widely from distillery to distillery, there is an incredible variety of flavor molecules. The complex composition of whis(e)ky includes many chemical compounds such as alcohols, aldehydes, phenols, various esters and many more. During the aging process, numerous compounds enter the whisk(e)y. Among them are two compounds that have given whisk(e)y its name: whisk(e)y lactones. These isomers can chromatographically separated on special "chiral GC phases" like LIPODEX E from MACHEREY‑NAGEL.
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DNA isolation from beverages and biofilms
The production of non-alcoholic and alcoholic beverages as well as drinking water is subject to strict quality and safety standards. Molecular biological analysis has many applications in this field: E.g., DNA-based analytics such as PCR and sequencing techniques can be used to detect contaminating bacteria, yeasts and germs in drinking water or biofilms along the production process, independent of cultivation. The NucleoMag DNA/RNA Water allows microbial nucleic acid extraction from large volume liquid samples.
With our NucleoMag Microbiome Kit you can purify the total DNA of microbial biofilms in your production process.
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Yeasts and bacteria starter cultures
Numerous beverages and foods in daily use are produced with the help of microorganisms such as yeasts, lactic acid bacteria, acetic acid bacteria and propionic acid bacteria. These are mainly used to break down organic compounds by fermentation processes. Most prominent processes are the production of wine, beer or vinegar. In most cases, cultivated high-performance strains of these organisms are used in modern large-scale industrial production of fermented foods and drings. For the genetic optimization of your starter cultures, whether fungi, yeasts or bacilli, you can use our kits specifically developed for cultivated microoranisms, e.g. the NucleoMag DNA Bacteria, the NucleoSpin Microbial DNA or the NucleoSpin DNA Yeast kit.
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